{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{1}{cc}}
\hline\hline
                    &\multicolumn{2}{c}{(1)}  \\
                    &\multicolumn{2}{c}{}     \\
                    &        Mean&   Std. Dev.\\
\hline
=1 if RN had at least one air\_incident in month&      0.0021&      0.0458\\
=1 if RN had at least one air investigation in month&      0.0255&      0.1577\\
=1 if RN had at least one complaint-related air investigation in month&      0.0021&      0.0454\\
=1 if RN had at least one non-complaint-related air investigation in month&      0.0238&      0.1523\\
=1 if RN had at least one NOV in month&      0.0032&      0.0561\\
=1 if RN had at least one air NOE in month&      0.0005&      0.0218\\
=1 if RN had at least one emission event incident in month&      0.0075&      0.0864\\
# of air complaints against OTHER RNs in region-month&     22.3966&     28.2912\\
\hline
Observations        &     4712400&            \\
\hline\hline
\end{tabular}
}
